The 4.10/3.50-4 inner tube is a perfect fit in the Fatboy Assault and Assault Pro mini BMX bikes. It can also be found on other applications such as on go-karts and gas-powered recreational scooters. This size inner tube is compatible with both very popular sizes of 3.00-4 and 9x3.5-4. Compatiblity: - Fatboy Assault - Fatboy Assault Pro and More...
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